(16)To ensure the disclosure of comparable and equivalent information, recognition and measurement principles should include the going concern, the prudence, and the accrual bases. Set-offs between asset and liability items and income and expense items should not be allowed and components of assets and liabilities should be valued separately. In specific cases, however, Member States should be allowed to permit or require undertakings to perform set-offs between asset and liability items and income and expense items. The presentation of items in financial statements should have regard to the economic reality or commercial substance of the underlying transaction or arrangement. Member States should, however, be allowed to exempt undertakings from applying that principle.